Looking for some input from some of you guys running wideband O2 or had experience with it.

I am looking at the following:
http://www.zeitronix.com/Products/zt2/zt2.htm

My main reason for looking at this is that, first and foremost, I need to buy an EGT gauge. I planned on a Greddy gauge which is going to run me $210 new and TRE probe for $45. TOTAL COST: $255 or so to monitor EGT.

vs. the following for an additional $165....

For $420 total, I can get the Zeitronixs ZT2 bundle and TRE probe, which allows me to monitor wideband O2 and EGT via an in-car LCD display or datalogged on my laptop.

I don't know much about the Zeitronix device, but there's a group buy going on on 3SI for it right now. However, it's supposed to have gotten very good reviews in other communities. The July issue of Import Tuner also rated it as very accurate against 8 other wideband devices.

Concern #1.
My only tuning mechanisms are an adjustable FPR (IPO dual feed kit) and an ARC2. I don't think the ARC2 can change fuel as accutely as other devices like an AFC-II, AEM, or Emanage. I'm wondering if the wideband would be even worthwhile if I can't even make small enough adjustments with my ARC2 and AFPR.

Concern #2.
Digital gauges... Seems to me an analog gauge is better for quick viewing. But OTOH, this device allows logging to a laptop and exporting to a spreadsheet, or viewing via a graph. Not sure which I'd like better...

Concern #3.
Maybe I don't even need a wideband. With my setup (DR500s, DNP Headers, Cam Gears, DR Stage 3 Heads, IPO Dual Feed, Denso 720s, RPS Clutch/RPS Flywheel, ARC2 w/87mm MAF, etc.) I'm not sure a wideband is even necessary. I'm pretty sure I can tune the car sufficiently with just a datalogger, stock O2 sensors, and a regular EGT gauge. And even if I had a wideband, my Concern #1 comes back into play...

So, in a nutshell, I could monitor only EGT for $255, or EGT and Wideband both for $420 or so.

Any input?
Jesse

The Zeitronixs like like a nice unit I am thinking about it also since my wb sensor is bad on my tech edge since a new one will cost me almost as much and the Bosch sensors are cheaper.

Do you absolutely need it, no
If you plan on dyno tunning it I would could put it at the bottom of your list of things to buy. Just log your O2's when you dyno it and compare them to the WB reading from the Dyno. Your tune shouldn't change to much after you dyno it.

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'94 vr4- Now with extra slowness

The stock O2s are about as accurate as the stock boost gauge, however, they are "good enough" for most. If you really want to be picky about tuning, you should have left the SAFC in as the adjustments in ARC can be a little too much or a little too little. A wideband will show you this.

The answer to your question becomes, "how picky are you?".

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06 Blue EVO 9

I think you summed it up pretty good Greg. How picky do I want to be? I dunno.

Do you think the ARC2 will be able to make use of a wideband? Meaning, would it's fuel correction be too broad for the minute detail of the wideband? If so, then I probably don't need it since I won't be able to make the proper adjustments anyways without an AFC or similiar piggyback device.

I know the stock O2s will be fine for tuning. Especially with a logger and EGT. Just not sure how picky I want to be... You win a bobble head, lol.

Jesse

Yes.

I honestly believe that if you are going standalone, a WBO2 is a necessity, however if you are using your average "piggy back", then it's not. You are not going to get that perfectly flat plateu A/F ratio with any piggyback.

Something to consider... do you know anyone running a WB along with just an ARC2? I don't recall anyone specifically, but if there was someone, they'd be a good reference.

I don't have 1st hand with a WB & the ARC, but I have tuned a car with a WB and a MAFT (early version). Same thing. The correction was too far one direction for each click of the dial.

I don't see why the ARC would be any different. ...but there has got to be a few guys on 3si who've tried tuning the ARC with a WB.